Q: Mitigate suction side hydraulic problem?
Q: Mitigate suction side hydraulic problem?
(OP)
Someplace I have read an article on mitigating the effects of suction side cavitation/flashing when there is insufficient NPSHa. I can't halt production to address root causes. I had heard that recycling some of the discharge flow to the suction of the pump may help.
Does anyone have a reference? I cannot recall how to introduce the fluid back to the suction line, the proportion of the discharge flow (10%?) or whether there is a way to predict the performance gain.
Thanks
Gary
Does anyone have a reference? I cannot recall how to introduce the fluid back to the suction line, the proportion of the discharge flow (10%?) or whether there is a way to predict the performance gain.
Thanks
Gary





RE: Q: Mitigate suction side hydraulic problem?
Regards,
RE: Q: Mitigate suction side hydraulic problem?
Googling found research on the recycle (bleed) principle. They claim it can increase pump efficency and reduce NPSHr.
http://
Seems to be due to entraining the flow, from the source tank, boosting the pressure into the pump. EG a transfer of mechanical energy from the recycle flow to the source tank flow, I guess like an eductor.
This Research was not the article I was thinking of. I think it was in Hydrocarbon Processing or Chemical Process or Chemical Engineering, but I can't find it. The recommendations were only a part of the article on improving pump operation.